> It's a shame that we need to defer to "China" as a shorthand for "actual engineers" just because our own engineers lack imagination and drive that would validate being given that title in the first place.

There are a lot of reasons other than skill why China is the way it is. Culture and locality are big ones. I don't know a whole lot but I disagree that any "actual engineer" could easily come up with a sustainable business for this stuff in the US -- for example, harvesting and processing used parts for their components is a hugely laborious process, and China has a huge culture of recycling and reworking that simply does not exist in the US (and would largely be socially unacceptable to introduce!). Take for example the pre-modded 4090s, or the BGA desktop motherboards I mentioned, or any number of other products that are based not merely on sheer engineering. It's not exactly engineering on its own that causes these things to happen, but more the fact that nearly anybody can just throw together an operation like that and have tons of workers available to make it sustainable.